<template>
    <div>
        <!--顶部滑动条区域-->
        <div id="slider" class="mui-slider ">
				<div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
					<div class="mui-scroll">
						<a :class="['mui-control=item', item.id ==0?'mui-active': '']"
						v-for="item in cates" :key="item.id" @click="getPhotoListCateId(item.id)"></a>
						<a class="mui-control-item mui-active" href="#item1mobile" data-wid="tab-top-subpage-1.html">
							推荐
						</a>
						<a class="mui-control-item" href="#item2mobile" data-wid="tab-top-subpage-2.html">
							热点
						</a>
						<a class="mui-control-item" href="#item3mobile" data-wid="tab-top-subpage-3.html">
							北京
						</a>
						<a class="mui-control-item" href="#item4mobile" data-wid="tab-top-subpage-4.html">
							社会
						</a>
						<a class="mui-control-item" href="#item5mobile" data-wid="tab-top-subpage-5.html">
							娱乐
						</a>
					</div>
				</div>

			</div>

			<!--图片列表区域-->
			<ul class="photo-list">
  				<router-link v-for= "item in list" :key="item.id"  
				  :to="'/home/photoinfo'+ item.id" tag="li">
   				<img  v-lazy="item.img_url">
				   <div class="info">
					   <h1 class="info-title">{{item.title}}</h1>
					   <div class="info-body">{{item.zhaiyao}}</div>
				   </div>
  				</router-link>
			</ul>
   	 </div>
	</template>

<script>
//1 导入 mui 的js文件
import mui from  '../../lib/mui/js/mui.min.js'

export default {
    data(){
		return {
			cates: [] ,//所有分类的列表数组
			list: []  //图片列表的数组
		};
	},
	created(){
		this.getAllCategory();
		// 默认进入页面，就主动请求所有图片列表的数据
		this.getPhotoListCateId(0);
	},
	mounted(){  
		//当组件中的DOM结构被渲染好并放到页面中去，会执行这个钩子函数
		//如果要操作元素，最好在 mounted 里面，因为这里面的DOM元素是最新的

		//2 初始化滑动控件
		mui('.mui-scroll-wrapper').scroll({
		deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
		});
	},
	methods: {
		getAllCategory(){
			//获取所有的图片分类
			this.$http.get('api/getimgcategory').then(result =>{
				if(result.body.status === 0){
					//手动拼接出一个最完整的分类列表
					result.body.message.unshift({ title:"全部", id:0});
					this.cates = result.body.message;
				}
			});
		},
		getPhotoListCateId(){
			//根据分类Id，获取图片列表
			this.$http.get("api/getimages/"+catedId).then (result =>{
				if(result.body.status === 0){
					this.list = result.body.message;
				}
			});
		}
	}
};
</script>

<style lang="scss" scoped>
	*{
		touch-action: pan-y;
	}

	.photo-list {
		list-style: none;
		margin:  0px;
		padding: 10px;
		padding-bottom:0;
		li {
			background-color: #ccc;
			text-align: center;
			margin-bottom: 10px;
			box-shadow: 0 0 6px  #999;
			position: relative;
			img{
				width: 100%;
				vertical-align: middle;
			}
			img[lazy="loading"] {
				width: 40px;
				height:300px;
				margin:auto;
			}
			.info {
				color: width;
				text-align: left;
				position: absolute;
				bottom: 0px;
				background-color: rgba(0,0,0,0.4);
				max-height: 84px;
				.info-title{
					font-size: 14px;
				}
				.info-body{
					font-size: 13px;
				}
			}
		}
	}

	img[lazy=loading] {
  		width: 40px;
 		 height: 300px;
 		 margin: auto;
	}
</style>


